1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <[email protected]> 7 */ 8 #ifndef _LINUX_IF_BRIDGE_H 9 #define _LINUX_IF_BRIDGE_H 10 11 12 #include <linux/netdevice.h> 13 #include <uapi/linux/if_bridge.h> 14 #include <linux/bitops.h> 15 16 struct br_ip { 17 union { 18 __be32 ip4; 19 #if IS_ENABLED(CONFIG_IPV6) 20 struct in6_addr ip6; 21 #endif 22 } src; 23 union { 24 __be32 ip4; 25 #if IS_ENABLED(CONFIG_IPV6) 26 struct in6_addr ip6; 27 #endif 28 unsigned char mac_addr[ETH_ALEN]; 29 } dst; 30 __be16 proto; 31 __u16 vid; 32 }; 33 34 struct br_ip_list { 35 struct list_head list; 36 struct br_ip addr; 37 }; 38 39 #define BR_HAIRPIN_MODE BIT(0) 40 #define BR_BPDU_GUARD BIT(1) 41 #define BR_ROOT_BLOCK BIT(2) 42 #define BR_MULTICAST_FAST_LEAVE BIT(3) 43 #define BR_ADMIN_COST BIT(4) 44 #define BR_LEARNING BIT(5) 45 #define BR_FLOOD BIT(6) 46 #define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING) 47 #define BR_PROMISC BIT(7) 48 #define BR_PROXYARP BIT(8) 49 #define BR_LEARNING_SYNC BIT(9) 50 #define BR_PROXYARP_WIFI BIT(10) 51 #define BR_MCAST_FLOOD BIT(11) 52 #define BR_MULTICAST_TO_UNICAST BIT(12) 53 #define BR_VLAN_TUNNEL BIT(13) 54 #define BR_BCAST_FLOOD BIT(14) 55 #define BR_NEIGH_SUPPRESS BIT(15) 56 #define BR_ISOLATED BIT(16) 57 #define BR_MRP_AWARE BIT(17) 58 #define BR_MRP_LOST_CONT BIT(18) 59 #define BR_MRP_LOST_IN_CONT BIT(19) 60 61 #define BR_DEFAULT_AGEING_TIME (300 * HZ) 62 63 extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *)); 64 65 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING) 66 int br_multicast_list_adjacent(struct net_device *dev, 67 struct list_head *br_ip_list); 68 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto); 69 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto); 70 bool br_multicast_has_router_adjacent(struct net_device *dev, int proto); 71 bool br_multicast_enabled(const struct net_device *dev); 72 bool br_multicast_router(const struct net_device *dev); 73 int br_mdb_replay(struct net_device *br_dev, struct net_device *dev, 74 struct notifier_block *nb, struct netlink_ext_ack *extack); 75 #else 76 static inline int br_multicast_list_adjacent(struct net_device *dev, 77 struct list_head *br_ip_list) 78 { 79 return 0; 80 } 81 static inline bool br_multicast_has_querier_anywhere(struct net_device *dev, 82 int proto) 83 { 84 return false; 85 } 86 static inline bool br_multicast_has_querier_adjacent(struct net_device *dev, 87 int proto) 88 { 89 return false; 90 } 91 92 static inline bool br_multicast_has_router_adjacent(struct net_device *dev, 93 int proto) 94 { 95 return true; 96 } 97 98 static inline bool br_multicast_enabled(const struct net_device *dev) 99 { 100 return false; 101 } 102 static inline bool br_multicast_router(const struct net_device *dev) 103 { 104 return false; 105 } 106 static inline int br_mdb_replay(struct net_device *br_dev, 107 struct net_device *dev, 108 struct notifier_block *nb, 109 struct netlink_ext_ack *extack) 110 { 111 return -EOPNOTSUPP; 112 } 113 #endif 114 115 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING) 116 bool br_vlan_enabled(const struct net_device *dev); 117 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid); 118 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid); 119 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto); 120 int br_vlan_get_info(const struct net_device *dev, u16 vid, 121 struct bridge_vlan_info *p_vinfo); 122 int br_vlan_replay(struct net_device *br_dev, struct net_device *dev, 123 struct notifier_block *nb, struct netlink_ext_ack *extack); 124 #else 125 static inline bool br_vlan_enabled(const struct net_device *dev) 126 { 127 return false; 128 } 129 130 static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 131 { 132 return -EINVAL; 133 } 134 135 static inline int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 136 { 137 return -EINVAL; 138 } 139 140 static inline int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 141 { 142 return -EINVAL; 143 } 144 145 static inline int br_vlan_get_info(const struct net_device *dev, u16 vid, 146 struct bridge_vlan_info *p_vinfo) 147 { 148 return -EINVAL; 149 } 150 151 static inline int br_vlan_replay(struct net_device *br_dev, 152 struct net_device *dev, 153 struct notifier_block *nb, 154 struct netlink_ext_ack *extack) 155 { 156 return -EOPNOTSUPP; 157 } 158 #endif 159 160 #if IS_ENABLED(CONFIG_BRIDGE) 161 struct net_device *br_fdb_find_port(const struct net_device *br_dev, 162 const unsigned char *addr, 163 __u16 vid); 164 void br_fdb_clear_offload(const struct net_device *dev, u16 vid); 165 bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag); 166 u8 br_port_get_stp_state(const struct net_device *dev); 167 clock_t br_get_ageing_time(struct net_device *br_dev); 168 int br_fdb_replay(struct net_device *br_dev, struct net_device *dev, 169 struct notifier_block *nb); 170 #else 171 static inline struct net_device * 172 br_fdb_find_port(const struct net_device *br_dev, 173 const unsigned char *addr, 174 __u16 vid) 175 { 176 return NULL; 177 } 178 179 static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid) 180 { 181 } 182 183 static inline bool 184 br_port_flag_is_set(const struct net_device *dev, unsigned long flag) 185 { 186 return false; 187 } 188 189 static inline u8 br_port_get_stp_state(const struct net_device *dev) 190 { 191 return BR_STATE_DISABLED; 192 } 193 194 static inline clock_t br_get_ageing_time(struct net_device *br_dev) 195 { 196 return 0; 197 } 198 199 static inline int br_fdb_replay(struct net_device *br_dev, 200 struct net_device *dev, 201 struct notifier_block *nb) 202 { 203 return -EOPNOTSUPP; 204 } 205 #endif 206 207 #endif 208